464 lines
16 KiB
C++
464 lines
16 KiB
C++
/*
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**
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** Copyright 2009, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include "context.h"
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#include "fp.h"
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#include "state.h"
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#include "matrix.h"
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#include "vertex.h"
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#include "light.h"
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#include "primitives.h"
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#include "texture.h"
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#include "BufferObjectManager.h"
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#include "TextureObjectManager.h"
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#include <hardware/gralloc.h>
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#include <hardware/copybit.h>
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#include <private/ui/android_natives_priv.h>
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#define DEBUG_COPYBIT true
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// ----------------------------------------------------------------------------
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namespace android {
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static void textureToCopyBitImage(
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const GGLSurface* surface, int32_t opFormat,
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buffer_handle_t buffer, copybit_image_t* img)
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{
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img->w = surface->stride;
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img->h = surface->height;
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img->format = opFormat;
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img->base = surface->data;
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img->handle = (native_handle_t *)buffer;
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}
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struct clipRectRegion : public copybit_region_t {
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clipRectRegion(ogles_context_t* c)
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{
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scissor_t const* scissor = &c->rasterizer.state.scissor;
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r.l = scissor->left;
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r.t = scissor->top;
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r.r = scissor->right;
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r.b = scissor->bottom;
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next = iterate;
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}
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private:
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static int iterate(copybit_region_t const * self, copybit_rect_t* rect) {
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*rect = static_cast<clipRectRegion const*>(self)->r;
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const_cast<copybit_region_t *>(self)->next = iterate_done;
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return 1;
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}
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static int iterate_done(copybit_region_t const *, copybit_rect_t*) {
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return 0;
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}
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copybit_rect_t r;
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};
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static bool supportedCopybitsFormat(int format) {
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switch (format) {
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case COPYBIT_FORMAT_RGBA_8888:
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case COPYBIT_FORMAT_RGBX_8888:
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case COPYBIT_FORMAT_RGB_888:
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case COPYBIT_FORMAT_RGB_565:
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case COPYBIT_FORMAT_BGRA_8888:
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case COPYBIT_FORMAT_RGBA_5551:
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case COPYBIT_FORMAT_RGBA_4444:
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case COPYBIT_FORMAT_YCbCr_422_SP:
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case COPYBIT_FORMAT_YCbCr_420_SP:
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return true;
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default:
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return false;
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}
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}
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static bool hasAlpha(int format) {
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switch (format) {
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case COPYBIT_FORMAT_RGBA_8888:
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case COPYBIT_FORMAT_BGRA_8888:
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case COPYBIT_FORMAT_RGBA_5551:
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case COPYBIT_FORMAT_RGBA_4444:
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return true;
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default:
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return false;
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}
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}
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static inline int fixedToByte(GGLfixed val) {
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return (val - (val >> 8)) >> 8;
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}
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/**
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* Performs a quick check of the rendering state. If this function returns
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* false we cannot use the copybit driver.
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*/
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static bool checkContext(ogles_context_t* c) {
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// By convention copybitQuickCheckContext() has already returned true.
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// avoid checking the same information again.
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if (c->copybits.blitEngine == NULL) {
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LOGD_IF(DEBUG_COPYBIT, "no copybit hal");
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return false;
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}
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if (c->rasterizer.state.enables
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& (GGL_ENABLE_DEPTH_TEST|GGL_ENABLE_FOG)) {
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LOGD_IF(DEBUG_COPYBIT, "depth test and/or fog");
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return false;
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}
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// Note: The drawSurfaceBuffer is only set for destination
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// surfaces types that are supported by the hardware and
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// do not have an alpha channel. So we don't have to re-check that here.
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static const int tmu = 0;
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texture_unit_t& u(c->textures.tmu[tmu]);
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EGLTextureObject* textureObject = u.texture;
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if (!supportedCopybitsFormat(textureObject->surface.format)) {
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LOGD_IF(DEBUG_COPYBIT, "texture format not supported");
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return false;
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}
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return true;
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}
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static bool copybit(GLint x, GLint y,
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GLint w, GLint h,
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EGLTextureObject* textureObject,
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const GLint* crop_rect,
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int transform,
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ogles_context_t* c)
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{
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// We assume checkContext has already been called and has already
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// returned true.
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const GGLSurface& cbSurface = c->rasterizer.state.buffers.color.s;
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y = cbSurface.height - (y + h);
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const GLint Ucr = crop_rect[0];
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const GLint Vcr = crop_rect[1];
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const GLint Wcr = crop_rect[2];
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const GLint Hcr = crop_rect[3];
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GLint screen_w = w;
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GLint screen_h = h;
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int32_t dsdx = Wcr << 16; // dsdx = ((Wcr/screen_w)/Wt)*Wt
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int32_t dtdy = Hcr << 16; // dtdy = -((Hcr/screen_h)/Ht)*Ht
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if (transform & COPYBIT_TRANSFORM_ROT_90) {
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swap(screen_w, screen_h);
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}
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if (dsdx!=screen_w || dtdy!=screen_h) {
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// in most cases the divide is not needed
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dsdx /= screen_w;
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dtdy /= screen_h;
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}
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dtdy = -dtdy; // see equation of dtdy above
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if (dsdx < c->copybits.minScale || dsdx > c->copybits.maxScale
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|| dtdy < c->copybits.minScale || dtdy > c->copybits.maxScale) {
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// The requested scale is out of the range the hardware
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// can support.
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LOGD_IF(DEBUG_COPYBIT,
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"scale out of range dsdx=%08x (Wcr=%d / w=%d), "
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"dtdy=%08x (Hcr=%d / h=%d), Ucr=%d, Vcr=%d",
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dsdx, Wcr, w, dtdy, Hcr, h, Ucr, Vcr);
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return false;
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}
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// copybit doesn't say anything about filtering, so we can't
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// discriminate. On msm7k, copybit will always filter.
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// the code below handles min/mag filters, we keep it as a reference.
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#ifdef MIN_MAG_FILTER
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int32_t texelArea = gglMulx(dtdy, dsdx);
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if (texelArea < FIXED_ONE && textureObject->mag_filter != GL_LINEAR) {
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// Non-linear filtering on a texture enlargement.
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LOGD_IF(DEBUG_COPYBIT, "mag filter is not GL_LINEAR");
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return false;
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}
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if (texelArea > FIXED_ONE && textureObject->min_filter != GL_LINEAR) {
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// Non-linear filtering on an texture shrink.
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LOGD_IF(DEBUG_COPYBIT, "min filter is not GL_LINEAR");
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return false;
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}
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#endif
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const uint32_t enables = c->rasterizer.state.enables;
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int planeAlpha = 255;
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static const int tmu = 0;
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texture_t& tev(c->rasterizer.state.texture[tmu]);
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int32_t opFormat = textureObject->surface.format;
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const bool srcTextureHasAlpha = hasAlpha(opFormat);
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if (!srcTextureHasAlpha) {
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planeAlpha = fixedToByte(c->currentColorClamped.a);
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}
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const bool cbHasAlpha = hasAlpha(cbSurface.format);
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bool blending = false;
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if ((enables & GGL_ENABLE_BLENDING)
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&& !(c->rasterizer.state.blend.src == GL_ONE
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&& c->rasterizer.state.blend.dst == GL_ZERO)) {
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// Blending is OK if it is
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// the exact kind of blending that the copybits hardware supports.
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// Note: The hardware only supports
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// GL_SRC_ALPHA / GL_ONE_MINUS_SRC_ALPHA,
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// But the surface flinger uses GL_ONE / GL_ONE_MINUS_SRC_ALPHA.
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// We substitute GL_SRC_ALPHA / GL_ONE_MINUS_SRC_ALPHA in that case,
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// because the performance is worth it, even if the results are
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// not correct.
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if (!((c->rasterizer.state.blend.src == GL_SRC_ALPHA
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|| c->rasterizer.state.blend.src == GL_ONE)
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&& c->rasterizer.state.blend.dst == GL_ONE_MINUS_SRC_ALPHA
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&& c->rasterizer.state.blend.alpha_separate == 0)) {
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// Incompatible blend mode.
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LOGD_IF(DEBUG_COPYBIT, "incompatible blend mode");
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return false;
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}
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blending = true;
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} else {
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if (cbHasAlpha) {
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// NOTE: the result will be slightly wrong in this case because
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// the destination alpha channel will be set to 1.0 instead of
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// the iterated alpha value. *shrug*.
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}
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// disable plane blending and src blending for supported formats
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planeAlpha = 255;
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if (opFormat == COPYBIT_FORMAT_RGBA_8888) {
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opFormat = COPYBIT_FORMAT_RGBX_8888;
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} else {
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if (srcTextureHasAlpha) {
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LOGD_IF(DEBUG_COPYBIT, "texture format requires blending");
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return false;
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}
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}
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}
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switch (tev.env) {
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case GGL_REPLACE:
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break;
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case GGL_MODULATE:
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// only cases allowed is:
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// RGB source, color={1,1,1,a} -> can be done with GL_REPLACE
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// RGBA source, color={1,1,1,1} -> can be done with GL_REPLACE
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if (blending) {
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if (c->currentColorClamped.r == c->currentColorClamped.a &&
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c->currentColorClamped.g == c->currentColorClamped.a &&
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c->currentColorClamped.b == c->currentColorClamped.a) {
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// TODO: Need to emulate: RGBA source, color={a,a,a,a} / premult
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// and RGBA source, color={1,1,1,a} / regular-blending
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// (both are equivalent)
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}
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}
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LOGD_IF(DEBUG_COPYBIT, "GGL_MODULATE");
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return false;
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default:
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// Incompatible texture environment.
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LOGD_IF(DEBUG_COPYBIT, "incompatible texture environment");
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return false;
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}
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// LOGW("calling copybits");
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copybit_device_t* copybit = c->copybits.blitEngine;
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copybit_image_t dst;
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buffer_handle_t target_hnd = c->copybits.drawSurfaceBuffer;
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textureToCopyBitImage(&cbSurface, cbSurface.format, target_hnd, &dst);
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copybit_rect_t drect = {x, y, x+w, y+h};
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copybit_image_t src;
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buffer_handle_t source_hnd = textureObject->buffer->handle;
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textureToCopyBitImage(&textureObject->surface, opFormat, source_hnd, &src);
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copybit_rect_t srect = { Ucr, Vcr + Hcr, Ucr + Wcr, Vcr };
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copybit->set_parameter(copybit, COPYBIT_TRANSFORM, transform);
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copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, planeAlpha);
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copybit->set_parameter(copybit, COPYBIT_DITHER,
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(enables & GGL_ENABLE_DITHER) ? COPYBIT_ENABLE : COPYBIT_DISABLE);
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clipRectRegion it(c);
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status_t err = copybit->stretch(copybit, &dst, &src, &drect, &srect, &it);
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if (err != NO_ERROR) {
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c->textures.tmu[0].texture->try_copybit = false;
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}
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return err == NO_ERROR ? true : false;
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}
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/*
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* Try to draw a triangle fan with copybit, return false if we fail.
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*/
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bool drawTriangleFanWithCopybit_impl(ogles_context_t* c, GLint first, GLsizei count)
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{
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if (!checkContext(c)) {
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return false;
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}
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// FIXME: we should handle culling here
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c->arrays.compileElements(c, c->vc.vBuffer, 0, 4);
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// we detect if we're dealing with a rectangle, by comparing the
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// rectangles {v0,v2} and {v1,v3} which should be identical.
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// NOTE: we should check that the rectangle is window aligned, however
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// if we do that, the optimization won't be taken in a lot of cases.
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// Since this code is intended to be used with SurfaceFlinger only,
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// so it's okay...
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const vec4_t& v0 = c->vc.vBuffer[0].window;
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const vec4_t& v1 = c->vc.vBuffer[1].window;
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const vec4_t& v2 = c->vc.vBuffer[2].window;
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const vec4_t& v3 = c->vc.vBuffer[3].window;
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int l = min(v0.x, v2.x);
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int b = min(v0.y, v2.y);
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int r = max(v0.x, v2.x);
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int t = max(v0.y, v2.y);
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if ((l != min(v1.x, v3.x)) || (b != min(v1.y, v3.y)) ||
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(r != max(v1.x, v3.x)) || (t != max(v1.y, v3.y))) {
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LOGD_IF(DEBUG_COPYBIT, "geometry not a rectangle");
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return false;
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}
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// fetch and transform texture coordinates
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// NOTE: maybe it would be better to have a "compileElementsAll" method
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// that would ensure all vertex data are fetched and transformed
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const transform_t& tr = c->transforms.texture[0].transform;
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for (size_t i=0 ; i<4 ; i++) {
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const GLubyte* tp = c->arrays.texture[0].element(i);
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vertex_t* const v = &c->vc.vBuffer[i];
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c->arrays.texture[0].fetch(c, v->texture[0].v, tp);
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// FIXME: we should bail if q!=1
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c->arrays.tex_transform[0](&tr, &v->texture[0], &v->texture[0]);
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}
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const vec4_t& t0 = c->vc.vBuffer[0].texture[0];
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const vec4_t& t1 = c->vc.vBuffer[1].texture[0];
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const vec4_t& t2 = c->vc.vBuffer[2].texture[0];
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const vec4_t& t3 = c->vc.vBuffer[3].texture[0];
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int txl = min(t0.x, t2.x);
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int txb = min(t0.y, t2.y);
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int txr = max(t0.x, t2.x);
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int txt = max(t0.y, t2.y);
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if ((txl != min(t1.x, t3.x)) || (txb != min(t1.y, t3.y)) ||
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(txr != max(t1.x, t3.x)) || (txt != max(t1.y, t3.y))) {
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LOGD_IF(DEBUG_COPYBIT, "texcoord not a rectangle");
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return false;
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}
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if ((txl != 0) || (txb != 0) ||
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(txr != FIXED_ONE) || (txt != FIXED_ONE)) {
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// we could probably handle this case, if we wanted to
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LOGD_IF(DEBUG_COPYBIT, "texture is cropped: %08x,%08x,%08x,%08x",
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txl, txb, txr, txt);
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return false;
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}
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// at this point, we know we are dealing with a rectangle, so we
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// only need to consider 3 vertices for computing the jacobians
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const int dx01 = v1.x - v0.x;
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const int dx02 = v2.x - v0.x;
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const int dy01 = v1.y - v0.y;
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const int dy02 = v2.y - v0.y;
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const int ds01 = t1.S - t0.S;
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const int ds02 = t2.S - t0.S;
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const int dt01 = t1.T - t0.T;
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const int dt02 = t2.T - t0.T;
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const int area = dx01*dy02 - dy01*dx02;
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int dsdx, dsdy, dtdx, dtdy;
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if (area >= 0) {
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dsdx = ds01*dy02 - ds02*dy01;
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dtdx = dt01*dy02 - dt02*dy01;
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dsdy = ds02*dx01 - ds01*dx02;
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dtdy = dt02*dx01 - dt01*dx02;
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} else {
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dsdx = ds02*dy01 - ds01*dy02;
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dtdx = dt02*dy01 - dt01*dy02;
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dsdy = ds01*dx02 - ds02*dx01;
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dtdy = dt01*dx02 - dt02*dx01;
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}
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// here we rely on the fact that we know the transform is
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// a rigid-body transform AND that it can only rotate in 90 degrees
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// increments
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int transform = 0;
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if (dsdx == 0) {
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// 90 deg rotation case
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// [ 0 dtdx ]
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// [ dsdx 0 ]
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transform |= COPYBIT_TRANSFORM_ROT_90;
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// FIXME: not sure if FLIP_H and FLIP_V shouldn't be inverted
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if (dtdx > 0)
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transform |= COPYBIT_TRANSFORM_FLIP_H;
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if (dsdy < 0)
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transform |= COPYBIT_TRANSFORM_FLIP_V;
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} else {
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// [ dsdx 0 ]
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// [ 0 dtdy ]
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if (dsdx < 0)
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transform |= COPYBIT_TRANSFORM_FLIP_H;
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if (dtdy < 0)
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transform |= COPYBIT_TRANSFORM_FLIP_V;
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}
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//LOGD("l=%d, b=%d, w=%d, h=%d, tr=%d", x, y, w, h, transform);
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//LOGD("A=%f\tB=%f\nC=%f\tD=%f",
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// dsdx/65536.0, dtdx/65536.0, dsdy/65536.0, dtdy/65536.0);
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int x = l >> 4;
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int y = b >> 4;
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int w = (r-l) >> 4;
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int h = (t-b) >> 4;
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texture_unit_t& u(c->textures.tmu[0]);
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EGLTextureObject* textureObject = u.texture;
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GLint tWidth = textureObject->surface.width;
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GLint tHeight = textureObject->surface.height;
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GLint crop_rect[4] = {0, tHeight, tWidth, -tHeight};
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const GGLSurface& cbSurface = c->rasterizer.state.buffers.color.s;
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y = cbSurface.height - (y + h);
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return copybit(x, y, w, h, textureObject, crop_rect, transform, c);
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}
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/*
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* Try to drawTexiOESWithCopybit, return false if we fail.
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*/
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bool drawTexiOESWithCopybit_impl(GLint x, GLint y, GLint z,
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GLint w, GLint h, ogles_context_t* c)
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{
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// quickly process empty rects
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if ((w|h) <= 0) {
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return true;
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}
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if (!checkContext(c)) {
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return false;
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}
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texture_unit_t& u(c->textures.tmu[0]);
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EGLTextureObject* textureObject = u.texture;
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return copybit(x, y, w, h, textureObject, textureObject->crop_rect, 0, c);
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}
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} // namespace android
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