eclair snapshot
diff --git a/opengl/libagl/copybit.cpp b/opengl/libagl/copybit.cpp
new file mode 100644
index 0000000..a68750e
--- /dev/null
+++ b/opengl/libagl/copybit.cpp
@@ -0,0 +1,631 @@
+/*
+**
+** Copyright 2009, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "context.h"
+#include "fp.h"
+#include "state.h"
+#include "matrix.h"
+#include "vertex.h"
+#include "light.h"
+#include "primitives.h"
+#include "texture.h"
+#include "BufferObjectManager.h"
+#include "TextureObjectManager.h"
+
+#include <hardware/gralloc.h>
+#include <hardware/copybit.h>
+#include <private/ui/android_natives_priv.h>
+
+#include <ui/GraphicBuffer.h>
+#include <ui/Region.h>
+#include <ui/Rect.h>
+
+
+#define DEBUG_COPYBIT true
+
+// ----------------------------------------------------------------------------
+
+namespace android {
+
+static void textureToCopyBitImage(
+ const GGLSurface* surface, int32_t opFormat,
+ android_native_buffer_t* buffer, copybit_image_t* img)
+{
+ uint32_t vstride = 0;
+ if (opFormat == COPYBIT_FORMAT_YCbCr_422_SP ||
+ opFormat == COPYBIT_FORMAT_YCbCr_420_SP) {
+ // NOTE: this static_cast is really not safe b/c we can't know for
+ // sure the buffer passed is of the right type.
+ // However, since we do this only for YUV formats, we should be safe
+ // since only SurfaceFlinger makes use of them.
+ GraphicBuffer* graphicBuffer = static_cast<GraphicBuffer*>(buffer);
+ vstride = graphicBuffer->getVerticalStride();
+ }
+
+ img->w = surface->stride;
+ img->h = vstride ? vstride : surface->height;
+ img->format = opFormat;
+ img->base = surface->data;
+ img->handle = (native_handle_t *)buffer->handle;
+}
+
+struct clipRectRegion : public copybit_region_t {
+ clipRectRegion(ogles_context_t* c)
+ {
+ scissor_t const* scissor = &c->rasterizer.state.scissor;
+ r.l = scissor->left;
+ r.t = scissor->top;
+ r.r = scissor->right;
+ r.b = scissor->bottom;
+ next = iterate;
+ }
+private:
+ static int iterate(copybit_region_t const * self, copybit_rect_t* rect) {
+ *rect = static_cast<clipRectRegion const*>(self)->r;
+ const_cast<copybit_region_t *>(self)->next = iterate_done;
+ return 1;
+ }
+ static int iterate_done(copybit_region_t const *, copybit_rect_t*) {
+ return 0;
+ }
+public:
+ copybit_rect_t r;
+};
+
+static bool supportedCopybitsFormat(int format) {
+ switch (format) {
+ case COPYBIT_FORMAT_RGBA_8888:
+ case COPYBIT_FORMAT_RGBX_8888:
+ case COPYBIT_FORMAT_RGB_888:
+ case COPYBIT_FORMAT_RGB_565:
+ case COPYBIT_FORMAT_BGRA_8888:
+ case COPYBIT_FORMAT_RGBA_5551:
+ case COPYBIT_FORMAT_RGBA_4444:
+ case COPYBIT_FORMAT_YCbCr_422_SP:
+ case COPYBIT_FORMAT_YCbCr_420_SP:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool hasAlpha(int format) {
+ switch (format) {
+ case COPYBIT_FORMAT_RGBA_8888:
+ case COPYBIT_FORMAT_BGRA_8888:
+ case COPYBIT_FORMAT_RGBA_5551:
+ case COPYBIT_FORMAT_RGBA_4444:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline int fixedToByte(GGLfixed val) {
+ return (val - (val >> 8)) >> 8;
+}
+
+/**
+ * Performs a quick check of the rendering state. If this function returns
+ * false we cannot use the copybit driver.
+ */
+
+static bool checkContext(ogles_context_t* c) {
+
+ // By convention copybitQuickCheckContext() has already returned true.
+ // avoid checking the same information again.
+
+ if (c->copybits.blitEngine == NULL) {
+ LOGD_IF(DEBUG_COPYBIT, "no copybit hal");
+ return false;
+ }
+
+ if (c->rasterizer.state.enables
+ & (GGL_ENABLE_DEPTH_TEST|GGL_ENABLE_FOG)) {
+ LOGD_IF(DEBUG_COPYBIT, "depth test and/or fog");
+ return false;
+ }
+
+ // Note: The drawSurfaceBuffer is only set for destination
+ // surfaces types that are supported by the hardware and
+ // do not have an alpha channel. So we don't have to re-check that here.
+
+ static const int tmu = 0;
+ texture_unit_t& u(c->textures.tmu[tmu]);
+ EGLTextureObject* textureObject = u.texture;
+
+ if (!supportedCopybitsFormat(textureObject->surface.format)) {
+ LOGD_IF(DEBUG_COPYBIT, "texture format not supported");
+ return false;
+ }
+ return true;
+}
+
+
+static bool copybit(GLint x, GLint y,
+ GLint w, GLint h,
+ EGLTextureObject* textureObject,
+ const GLint* crop_rect,
+ int transform,
+ ogles_context_t* c)
+{
+ status_t err = NO_ERROR;
+
+ // We assume checkContext has already been called and has already
+ // returned true.
+
+ const GGLSurface& cbSurface = c->rasterizer.state.buffers.color.s;
+
+ y = cbSurface.height - (y + h);
+
+ const GLint Ucr = crop_rect[0];
+ const GLint Vcr = crop_rect[1];
+ const GLint Wcr = crop_rect[2];
+ const GLint Hcr = crop_rect[3];
+
+ GLint screen_w = w;
+ GLint screen_h = h;
+ int32_t dsdx = Wcr << 16; // dsdx = ((Wcr/screen_w)/Wt)*Wt
+ int32_t dtdy = Hcr << 16; // dtdy = -((Hcr/screen_h)/Ht)*Ht
+ if (transform & COPYBIT_TRANSFORM_ROT_90) {
+ swap(screen_w, screen_h);
+ }
+ if (dsdx!=screen_w || dtdy!=screen_h) {
+ // in most cases the divide is not needed
+ dsdx /= screen_w;
+ dtdy /= screen_h;
+ }
+ dtdy = -dtdy; // see equation of dtdy above
+
+ // copybit doesn't say anything about filtering, so we can't
+ // discriminate. On msm7k, copybit will always filter.
+ // the code below handles min/mag filters, we keep it as a reference.
+
+#ifdef MIN_MAG_FILTER
+ int32_t texelArea = gglMulx(dtdy, dsdx);
+ if (texelArea < FIXED_ONE && textureObject->mag_filter != GL_LINEAR) {
+ // Non-linear filtering on a texture enlargement.
+ LOGD_IF(DEBUG_COPYBIT, "mag filter is not GL_LINEAR");
+ return false;
+ }
+ if (texelArea > FIXED_ONE && textureObject->min_filter != GL_LINEAR) {
+ // Non-linear filtering on an texture shrink.
+ LOGD_IF(DEBUG_COPYBIT, "min filter is not GL_LINEAR");
+ return false;
+ }
+#endif
+
+ const uint32_t enables = c->rasterizer.state.enables;
+ int planeAlpha = 255;
+ bool alphaPlaneWorkaround = false;
+ static const int tmu = 0;
+ texture_t& tev(c->rasterizer.state.texture[tmu]);
+ int32_t opFormat = textureObject->surface.format;
+ const bool srcTextureHasAlpha = hasAlpha(opFormat);
+ if (!srcTextureHasAlpha) {
+ planeAlpha = fixedToByte(c->currentColorClamped.a);
+ }
+
+ const bool cbHasAlpha = hasAlpha(cbSurface.format);
+ bool blending = false;
+ if ((enables & GGL_ENABLE_BLENDING)
+ && !(c->rasterizer.state.blend.src == GL_ONE
+ && c->rasterizer.state.blend.dst == GL_ZERO)) {
+ // Blending is OK if it is
+ // the exact kind of blending that the copybits hardware supports.
+ // Note: The hardware only supports
+ // GL_SRC_ALPHA / GL_ONE_MINUS_SRC_ALPHA,
+ // But the surface flinger uses GL_ONE / GL_ONE_MINUS_SRC_ALPHA.
+ // We substitute GL_SRC_ALPHA / GL_ONE_MINUS_SRC_ALPHA in that case,
+ // because the performance is worth it, even if the results are
+ // not correct.
+ if (!((c->rasterizer.state.blend.src == GL_SRC_ALPHA
+ || c->rasterizer.state.blend.src == GL_ONE)
+ && c->rasterizer.state.blend.dst == GL_ONE_MINUS_SRC_ALPHA
+ && c->rasterizer.state.blend.alpha_separate == 0)) {
+ // Incompatible blend mode.
+ LOGD_IF(DEBUG_COPYBIT, "incompatible blend mode");
+ return false;
+ }
+ blending = true;
+ } else {
+ if (cbHasAlpha) {
+ // NOTE: the result will be slightly wrong in this case because
+ // the destination alpha channel will be set to 1.0 instead of
+ // the iterated alpha value. *shrug*.
+ }
+ // disable plane blending and src blending for supported formats
+ planeAlpha = 255;
+ if (opFormat == COPYBIT_FORMAT_RGBA_8888) {
+ opFormat = COPYBIT_FORMAT_RGBX_8888;
+ } else {
+ if (srcTextureHasAlpha) {
+ LOGD_IF(DEBUG_COPYBIT, "texture format requires blending");
+ return false;
+ }
+ }
+ }
+
+ switch (tev.env) {
+ case GGL_REPLACE:
+ break;
+ case GGL_MODULATE:
+ // only cases allowed is:
+ // RGB source, color={1,1,1,a} -> can be done with GL_REPLACE
+ // RGBA source, color={1,1,1,1} -> can be done with GL_REPLACE
+ if (blending) {
+ if (c->currentColorClamped.r == c->currentColorClamped.a &&
+ c->currentColorClamped.g == c->currentColorClamped.a &&
+ c->currentColorClamped.b == c->currentColorClamped.a) {
+ // TODO: RGBA source, color={1,1,1,a} / regular-blending
+ // is equivalent
+ alphaPlaneWorkaround = true;
+ break;
+ }
+ }
+ LOGD_IF(DEBUG_COPYBIT, "GGL_MODULATE");
+ return false;
+ default:
+ // Incompatible texture environment.
+ LOGD_IF(DEBUG_COPYBIT, "incompatible texture environment");
+ return false;
+ }
+
+ copybit_device_t* copybit = c->copybits.blitEngine;
+ copybit_image_t src;
+ textureToCopyBitImage(&textureObject->surface, opFormat,
+ textureObject->buffer, &src);
+ copybit_rect_t srect = { Ucr, Vcr + Hcr, Ucr + Wcr, Vcr };
+
+ /*
+ * Below we perform extra passes needed to emulate things the h/w
+ * cannot do.
+ */
+
+ const GLfixed minScaleInv = gglDivQ(0x10000, c->copybits.minScale, 16);
+ const GLfixed maxScaleInv = gglDivQ(0x10000, c->copybits.maxScale, 16);
+
+ sp<GraphicBuffer> tempBitmap;
+
+ if (dsdx < maxScaleInv || dsdx > minScaleInv ||
+ dtdy < maxScaleInv || dtdy > minScaleInv)
+ {
+ // The requested scale is out of the range the hardware
+ // can support.
+ LOGD_IF(DEBUG_COPYBIT,
+ "scale out of range dsdx=%08x (Wcr=%d / w=%d), "
+ "dtdy=%08x (Hcr=%d / h=%d), Ucr=%d, Vcr=%d",
+ dsdx, Wcr, w, dtdy, Hcr, h, Ucr, Vcr);
+
+ int32_t xscale=0x10000, yscale=0x10000;
+ if (dsdx > minScaleInv) xscale = c->copybits.minScale;
+ else if (dsdx < maxScaleInv) xscale = c->copybits.maxScale;
+ if (dtdy > minScaleInv) yscale = c->copybits.minScale;
+ else if (dtdy < maxScaleInv) yscale = c->copybits.maxScale;
+ dsdx = gglMulx(dsdx, xscale);
+ dtdy = gglMulx(dtdy, yscale);
+
+ /* we handle only one step of resizing below. Handling an arbitrary
+ * number is relatively easy (replace "if" above by "while"), but requires
+ * two intermediate buffers and so far we never had the need.
+ */
+
+ if (dsdx < maxScaleInv || dsdx > minScaleInv ||
+ dtdy < maxScaleInv || dtdy > minScaleInv) {
+ LOGD_IF(DEBUG_COPYBIT,
+ "scale out of range dsdx=%08x (Wcr=%d / w=%d), "
+ "dtdy=%08x (Hcr=%d / h=%d), Ucr=%d, Vcr=%d",
+ dsdx, Wcr, w, dtdy, Hcr, h, Ucr, Vcr);
+ return false;
+ }
+
+ const int tmp_w = gglMulx(srect.r - srect.l, xscale, 16);
+ const int tmp_h = gglMulx(srect.b - srect.t, yscale, 16);
+
+ LOGD_IF(DEBUG_COPYBIT,
+ "xscale=%08x, yscale=%08x, dsdx=%08x, dtdy=%08x, tmp_w=%d, tmp_h=%d",
+ xscale, yscale, dsdx, dtdy, tmp_w, tmp_h);
+
+ tempBitmap = new GraphicBuffer(
+ tmp_w, tmp_h, src.format,
+ GraphicBuffer::USAGE_HW_2D);
+
+ err = tempBitmap->initCheck();
+ if (err == NO_ERROR) {
+ copybit_image_t tmp_dst;
+ copybit_rect_t tmp_rect;
+ tmp_dst.w = tmp_w;
+ tmp_dst.h = tmp_h;
+ tmp_dst.format = tempBitmap->format;
+ tmp_dst.handle = (native_handle_t*)tempBitmap->getNativeBuffer()->handle;
+ tmp_rect.l = 0;
+ tmp_rect.t = 0;
+ tmp_rect.r = tmp_dst.w;
+ tmp_rect.b = tmp_dst.h;
+ region_iterator tmp_it(Region(Rect(tmp_rect.r, tmp_rect.b)));
+ copybit->set_parameter(copybit, COPYBIT_TRANSFORM, 0);
+ copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, 0xFF);
+ copybit->set_parameter(copybit, COPYBIT_DITHER, COPYBIT_DISABLE);
+ err = copybit->stretch(copybit,
+ &tmp_dst, &src, &tmp_rect, &srect, &tmp_it);
+ src = tmp_dst;
+ srect = tmp_rect;
+ }
+ }
+
+ copybit_image_t dst;
+ textureToCopyBitImage(&cbSurface, cbSurface.format,
+ c->copybits.drawSurfaceBuffer, &dst);
+ copybit_rect_t drect = {x, y, x+w, y+h};
+
+
+ /* and now the alpha-plane hack. This handles the "Fade" case of a
+ * texture with an alpha channel.
+ */
+ if (alphaPlaneWorkaround) {
+ sp<GraphicBuffer> tempCb = new GraphicBuffer(
+ w, h, COPYBIT_FORMAT_RGB_565,
+ GraphicBuffer::USAGE_HW_2D);
+
+ err = tempCb->initCheck();
+
+ copybit_image_t tmpCbImg;
+ copybit_rect_t tmpCbRect;
+ copybit_rect_t tmpdrect = drect;
+ tmpCbImg.w = w;
+ tmpCbImg.h = h;
+ tmpCbImg.format = tempCb->format;
+ tmpCbImg.handle = (native_handle_t*)tempCb->getNativeBuffer()->handle;
+ tmpCbRect.l = 0;
+ tmpCbRect.t = 0;
+
+ if (drect.l < 0) {
+ tmpCbRect.l = -tmpdrect.l;
+ tmpdrect.l = 0;
+ }
+ if (drect.t < 0) {
+ tmpCbRect.t = -tmpdrect.t;
+ tmpdrect.t = 0;
+ }
+ if (drect.l + tmpCbImg.w > dst.w) {
+ tmpCbImg.w = dst.w - drect.l;
+ tmpdrect.r = dst.w;
+ }
+ if (drect.t + tmpCbImg.h > dst.h) {
+ tmpCbImg.h = dst.h - drect.t;
+ tmpdrect.b = dst.h;
+ }
+
+ tmpCbRect.r = tmpCbImg.w;
+ tmpCbRect.b = tmpCbImg.h;
+
+ if (!err) {
+ // first make a copy of the destination buffer
+ region_iterator tmp_it(Region(Rect(w, h)));
+ copybit->set_parameter(copybit, COPYBIT_TRANSFORM, 0);
+ copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, 0xFF);
+ copybit->set_parameter(copybit, COPYBIT_DITHER, COPYBIT_DISABLE);
+ err = copybit->stretch(copybit,
+ &tmpCbImg, &dst, &tmpCbRect, &tmpdrect, &tmp_it);
+ }
+ if (!err) {
+ // then proceed as usual, but without the alpha plane
+ copybit->set_parameter(copybit, COPYBIT_TRANSFORM, transform);
+ copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, 0xFF);
+ copybit->set_parameter(copybit, COPYBIT_DITHER,
+ (enables & GGL_ENABLE_DITHER) ?
+ COPYBIT_ENABLE : COPYBIT_DISABLE);
+ clipRectRegion it(c);
+ err = copybit->stretch(copybit, &dst, &src, &drect, &srect, &it);
+ }
+ if (!err) {
+ // finally copy back the destination on top with 1-alphaplane
+ int invPlaneAlpha = 0xFF - fixedToByte(c->currentColorClamped.a);
+ clipRectRegion it(c);
+ copybit->set_parameter(copybit, COPYBIT_TRANSFORM, 0);
+ copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, invPlaneAlpha);
+ copybit->set_parameter(copybit, COPYBIT_DITHER, COPYBIT_ENABLE);
+ err = copybit->stretch(copybit,
+ &dst, &tmpCbImg, &tmpdrect, &tmpCbRect, &it);
+ }
+ } else {
+ copybit->set_parameter(copybit, COPYBIT_TRANSFORM, transform);
+ copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, planeAlpha);
+ copybit->set_parameter(copybit, COPYBIT_DITHER,
+ (enables & GGL_ENABLE_DITHER) ?
+ COPYBIT_ENABLE : COPYBIT_DISABLE);
+ clipRectRegion it(c);
+
+ LOGD_IF(0,
+ "dst={%d, %d, %d, %p, %p}, "
+ "src={%d, %d, %d, %p, %p}, "
+ "drect={%d,%d,%d,%d}, "
+ "srect={%d,%d,%d,%d}, "
+ "it={%d,%d,%d,%d}, " ,
+ dst.w, dst.h, dst.format, dst.base, dst.handle,
+ src.w, src.h, src.format, src.base, src.handle,
+ drect.l, drect.t, drect.r, drect.b,
+ srect.l, srect.t, srect.r, srect.b,
+ it.r.l, it.r.t, it.r.r, it.r.b
+ );
+
+ err = copybit->stretch(copybit, &dst, &src, &drect, &srect, &it);
+ }
+ if (err != NO_ERROR) {
+ c->textures.tmu[0].texture->try_copybit = false;
+ }
+ return err == NO_ERROR ? true : false;
+}
+
+/*
+ * Try to draw a triangle fan with copybit, return false if we fail.
+ */
+bool drawTriangleFanWithCopybit_impl(ogles_context_t* c, GLint first, GLsizei count)
+{
+ if (!checkContext(c)) {
+ return false;
+ }
+
+ // FIXME: we should handle culling here
+ c->arrays.compileElements(c, c->vc.vBuffer, 0, 4);
+
+ // we detect if we're dealing with a rectangle, by comparing the
+ // rectangles {v0,v2} and {v1,v3} which should be identical.
+
+ // NOTE: we should check that the rectangle is window aligned, however
+ // if we do that, the optimization won't be taken in a lot of cases.
+ // Since this code is intended to be used with SurfaceFlinger only,
+ // so it's okay...
+
+ const vec4_t& v0 = c->vc.vBuffer[0].window;
+ const vec4_t& v1 = c->vc.vBuffer[1].window;
+ const vec4_t& v2 = c->vc.vBuffer[2].window;
+ const vec4_t& v3 = c->vc.vBuffer[3].window;
+ int l = min(v0.x, v2.x);
+ int b = min(v0.y, v2.y);
+ int r = max(v0.x, v2.x);
+ int t = max(v0.y, v2.y);
+ if ((l != min(v1.x, v3.x)) || (b != min(v1.y, v3.y)) ||
+ (r != max(v1.x, v3.x)) || (t != max(v1.y, v3.y))) {
+ LOGD_IF(DEBUG_COPYBIT, "geometry not a rectangle");
+ return false;
+ }
+
+ // fetch and transform texture coordinates
+ // NOTE: maybe it would be better to have a "compileElementsAll" method
+ // that would ensure all vertex data are fetched and transformed
+ const transform_t& tr = c->transforms.texture[0].transform;
+ for (size_t i=0 ; i<4 ; i++) {
+ const GLubyte* tp = c->arrays.texture[0].element(i);
+ vertex_t* const v = &c->vc.vBuffer[i];
+ c->arrays.texture[0].fetch(c, v->texture[0].v, tp);
+ // FIXME: we should bail if q!=1
+ c->arrays.tex_transform[0](&tr, &v->texture[0], &v->texture[0]);
+ }
+
+ const vec4_t& t0 = c->vc.vBuffer[0].texture[0];
+ const vec4_t& t1 = c->vc.vBuffer[1].texture[0];
+ const vec4_t& t2 = c->vc.vBuffer[2].texture[0];
+ const vec4_t& t3 = c->vc.vBuffer[3].texture[0];
+ int txl = min(t0.x, t2.x);
+ int txb = min(t0.y, t2.y);
+ int txr = max(t0.x, t2.x);
+ int txt = max(t0.y, t2.y);
+ if ((txl != min(t1.x, t3.x)) || (txb != min(t1.y, t3.y)) ||
+ (txr != max(t1.x, t3.x)) || (txt != max(t1.y, t3.y))) {
+ LOGD_IF(DEBUG_COPYBIT, "texcoord not a rectangle");
+ return false;
+ }
+ if ((txl != 0) || (txb != 0) ||
+ (txr != FIXED_ONE) || (txt != FIXED_ONE)) {
+ // we could probably handle this case, if we wanted to
+ LOGD_IF(DEBUG_COPYBIT, "texture is cropped: %08x,%08x,%08x,%08x",
+ txl, txb, txr, txt);
+ return false;
+ }
+
+ // at this point, we know we are dealing with a rectangle, so we
+ // only need to consider 3 vertices for computing the jacobians
+
+ const int dx01 = v1.x - v0.x;
+ const int dx02 = v2.x - v0.x;
+ const int dy01 = v1.y - v0.y;
+ const int dy02 = v2.y - v0.y;
+ const int ds01 = t1.S - t0.S;
+ const int ds02 = t2.S - t0.S;
+ const int dt01 = t1.T - t0.T;
+ const int dt02 = t2.T - t0.T;
+ const int area = dx01*dy02 - dy01*dx02;
+ int dsdx, dsdy, dtdx, dtdy;
+ if (area >= 0) {
+ dsdx = ds01*dy02 - ds02*dy01;
+ dtdx = dt01*dy02 - dt02*dy01;
+ dsdy = ds02*dx01 - ds01*dx02;
+ dtdy = dt02*dx01 - dt01*dx02;
+ } else {
+ dsdx = ds02*dy01 - ds01*dy02;
+ dtdx = dt02*dy01 - dt01*dy02;
+ dsdy = ds01*dx02 - ds02*dx01;
+ dtdy = dt01*dx02 - dt02*dx01;
+ }
+
+ // here we rely on the fact that we know the transform is
+ // a rigid-body transform AND that it can only rotate in 90 degrees
+ // increments
+
+ int transform = 0;
+ if (dsdx == 0) {
+ // 90 deg rotation case
+ // [ 0 dtdx ]
+ // [ dsdx 0 ]
+ transform |= COPYBIT_TRANSFORM_ROT_90;
+ // FIXME: not sure if FLIP_H and FLIP_V shouldn't be inverted
+ if (dtdx > 0)
+ transform |= COPYBIT_TRANSFORM_FLIP_H;
+ if (dsdy < 0)
+ transform |= COPYBIT_TRANSFORM_FLIP_V;
+ } else {
+ // [ dsdx 0 ]
+ // [ 0 dtdy ]
+ if (dsdx < 0)
+ transform |= COPYBIT_TRANSFORM_FLIP_H;
+ if (dtdy < 0)
+ transform |= COPYBIT_TRANSFORM_FLIP_V;
+ }
+
+ //LOGD("l=%d, b=%d, w=%d, h=%d, tr=%d", x, y, w, h, transform);
+ //LOGD("A=%f\tB=%f\nC=%f\tD=%f",
+ // dsdx/65536.0, dtdx/65536.0, dsdy/65536.0, dtdy/65536.0);
+
+ int x = l >> 4;
+ int y = b >> 4;
+ int w = (r-l) >> 4;
+ int h = (t-b) >> 4;
+ texture_unit_t& u(c->textures.tmu[0]);
+ EGLTextureObject* textureObject = u.texture;
+ GLint tWidth = textureObject->surface.width;
+ GLint tHeight = textureObject->surface.height;
+ GLint crop_rect[4] = {0, tHeight, tWidth, -tHeight};
+ const GGLSurface& cbSurface = c->rasterizer.state.buffers.color.s;
+ y = cbSurface.height - (y + h);
+ return copybit(x, y, w, h, textureObject, crop_rect, transform, c);
+}
+
+/*
+ * Try to drawTexiOESWithCopybit, return false if we fail.
+ */
+
+bool drawTexiOESWithCopybit_impl(GLint x, GLint y, GLint z,
+ GLint w, GLint h, ogles_context_t* c)
+{
+ // quickly process empty rects
+ if ((w|h) <= 0) {
+ return true;
+ }
+ if (!checkContext(c)) {
+ return false;
+ }
+ texture_unit_t& u(c->textures.tmu[0]);
+ EGLTextureObject* textureObject = u.texture;
+ return copybit(x, y, w, h, textureObject, textureObject->crop_rect, 0, c);
+}
+
+} // namespace android
+