diff options
Diffstat (limited to 'gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc')
| -rw-r--r-- | gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc | 196 |
1 files changed, 158 insertions, 38 deletions
diff --git a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc index 9098aba..e3c9b6a 100644 --- a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc +++ b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc @@ -32,6 +32,11 @@ namespace { +const GLfloat kIdentityMatrix[16] = {1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f}; + enum VertexShaderId { VERTEX_SHADER_COPY_TEXTURE, VERTEX_SHADER_COPY_TEXTURE_FLIP_Y, @@ -188,7 +193,6 @@ void DeleteShader(GLuint shader) { bool BindFramebufferTexture2D(GLenum target, GLuint texture_id, - GLint level, GLuint framebuffer) { DCHECK(target == GL_TEXTURE_2D || target == GL_TEXTURE_RECTANGLE_ARB); glActiveTexture(GL_TEXTURE0); @@ -200,8 +204,8 @@ bool BindFramebufferTexture2D(GLenum target, glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebuffer); - glFramebufferTexture2DEXT( - GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target, texture_id, level); + glFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target, + texture_id, 0); #ifndef NDEBUG GLenum fb_status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER); @@ -217,28 +221,20 @@ void DoCopyTexImage2D(const gpu::gles2::GLES2Decoder* decoder, GLenum source_target, GLuint source_id, GLuint dest_id, - GLint dest_level, GLenum dest_internal_format, GLsizei width, GLsizei height, GLuint framebuffer) { DCHECK(source_target == GL_TEXTURE_2D || source_target == GL_TEXTURE_RECTANGLE_ARB); - if (BindFramebufferTexture2D( - source_target, source_id, 0 /* level */, framebuffer)) { + if (BindFramebufferTexture2D(source_target, source_id, framebuffer)) { glBindTexture(GL_TEXTURE_2D, dest_id); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glCopyTexImage2D(GL_TEXTURE_2D, - dest_level, - dest_internal_format, - 0 /* x */, - 0 /* y */, - width, - height, - 0 /* border */); + glCopyTexImage2D(GL_TEXTURE_2D, 0 /* level */, dest_internal_format, + 0 /* x */, 0 /* y */, width, height, 0 /* border */); } decoder->RestoreTextureState(source_id); @@ -248,6 +244,45 @@ void DoCopyTexImage2D(const gpu::gles2::GLES2Decoder* decoder, decoder->RestoreFramebufferBindings(); } +void DoCopyTexSubImage2D(const gpu::gles2::GLES2Decoder* decoder, + GLenum source_target, + GLuint source_id, + GLuint dest_id, + GLint xoffset, + GLint yoffset, + GLsizei source_width, + GLsizei source_height, + GLuint framebuffer) { + DCHECK(source_target == GL_TEXTURE_2D || + source_target == GL_TEXTURE_RECTANGLE_ARB); + if (BindFramebufferTexture2D(source_target, source_id, framebuffer)) { + glBindTexture(GL_TEXTURE_2D, dest_id); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glCopyTexSubImage2D(GL_TEXTURE_2D, 0 /* level */, xoffset, yoffset, + 0 /* x */, 0 /* y */, source_width, source_height); + } + + decoder->RestoreTextureState(source_id); + decoder->RestoreTextureState(dest_id); + decoder->RestoreTextureUnitBindings(0); + decoder->RestoreActiveTexture(); + decoder->RestoreFramebufferBindings(); +} + +// Copy from SkMatrix44::preTranslate +void PreTranslate(GLfloat* matrix, GLfloat dx, GLfloat dy, GLfloat dz) { + if (!dx && !dy && !dz) + return; + + for (int i = 0; i < 4; ++i) { + matrix[(3 * 4) + i] = matrix[(0 * 4) + i] * dx + matrix[(1 * 4) + i] * dy + + matrix[(2 * 4) + i] * dz + matrix[(3 * 4) + i]; + } +} + } // namespace namespace gpu { @@ -318,7 +353,6 @@ void CopyTextureCHROMIUMResourceManager::DoCopyTexture( GLuint source_id, GLenum source_internal_format, GLuint dest_id, - GLint dest_level, GLenum dest_internal_format, GLsizei width, GLsizei height, @@ -342,7 +376,6 @@ void CopyTextureCHROMIUMResourceManager::DoCopyTexture( source_target, source_id, dest_id, - dest_level, dest_internal_format, width, height, @@ -350,22 +383,51 @@ void CopyTextureCHROMIUMResourceManager::DoCopyTexture( return; } - // Use default transform matrix if no transform passed in. - const static GLfloat default_matrix[16] = {1.0f, 0.0f, 0.0f, 0.0f, - 0.0f, 1.0f, 0.0f, 0.0f, - 0.0f, 0.0f, 1.0f, 0.0f, - 0.0f, 0.0f, 0.0f, 1.0f}; - DoCopyTextureWithTransform(decoder, - source_target, - source_id, - dest_id, - dest_level, - width, - height, - flip_y, - premultiply_alpha, - unpremultiply_alpha, - default_matrix); + // Use kIdentityMatrix if no transform passed in. + DoCopyTextureWithTransform(decoder, source_target, source_id, dest_id, width, + height, flip_y, premultiply_alpha, + unpremultiply_alpha, kIdentityMatrix); +} + +void CopyTextureCHROMIUMResourceManager::DoCopySubTexture( + const gles2::GLES2Decoder* decoder, + GLenum source_target, + GLuint source_id, + GLenum source_internal_format, + GLuint dest_id, + GLenum dest_internal_format, + GLint xoffset, + GLint yoffset, + GLsizei dest_width, + GLsizei dest_height, + GLsizei source_width, + GLsizei source_height, + bool flip_y, + bool premultiply_alpha, + bool unpremultiply_alpha) { + bool premultiply_alpha_change = premultiply_alpha ^ unpremultiply_alpha; + // GL_INVALID_OPERATION is generated if the currently bound framebuffer's + // format does not contain a superset of the components required by the base + // format of internalformat. + // https://www.khronos.org/opengles/sdk/docs/man/xhtml/glCopyTexImage2D.xml + bool source_format_contain_superset_of_dest_format = + (source_internal_format == dest_internal_format && + source_internal_format != GL_BGRA_EXT) || + (source_internal_format == GL_RGBA && dest_internal_format == GL_RGB); + // GL_TEXTURE_RECTANGLE_ARB on FBO is supported by OpenGL, not GLES2, + // so restrict this to GL_TEXTURE_2D. + if (source_target == GL_TEXTURE_2D && !flip_y && !premultiply_alpha_change && + source_format_contain_superset_of_dest_format) { + DoCopyTexSubImage2D(decoder, source_target, source_id, dest_id, xoffset, + yoffset, source_width, source_height, framebuffer_); + return; + } + + // Use kIdentityMatrix if no transform passed in. + DoCopySubTextureWithTransform( + decoder, source_target, source_id, dest_id, xoffset, yoffset, dest_width, + dest_height, source_width, source_height, flip_y, premultiply_alpha, + unpremultiply_alpha, kIdentityMatrix); } void CopyTextureCHROMIUMResourceManager::DoCopyTextureWithTransform( @@ -373,16 +435,61 @@ void CopyTextureCHROMIUMResourceManager::DoCopyTextureWithTransform( GLenum source_target, GLuint source_id, GLuint dest_id, - GLint dest_level, GLsizei width, GLsizei height, bool flip_y, bool premultiply_alpha, bool unpremultiply_alpha, const GLfloat transform_matrix[16]) { + GLsizei dest_width = width; + GLsizei dest_height = height; + DoCopyTextureInternal(decoder, source_target, source_id, dest_id, 0, 0, + dest_width, dest_height, width, height, flip_y, + premultiply_alpha, unpremultiply_alpha, + transform_matrix); +} + +void CopyTextureCHROMIUMResourceManager::DoCopySubTextureWithTransform( + const gles2::GLES2Decoder* decoder, + GLenum source_target, + GLuint source_id, + GLuint dest_id, + GLint xoffset, + GLint yoffset, + GLsizei dest_width, + GLsizei dest_height, + GLsizei source_width, + GLsizei source_height, + bool flip_y, + bool premultiply_alpha, + bool unpremultiply_alpha, + const GLfloat transform_matrix[16]) { + DoCopyTextureInternal(decoder, source_target, source_id, dest_id, xoffset, + yoffset, dest_width, dest_height, source_width, + source_height, flip_y, premultiply_alpha, + unpremultiply_alpha, transform_matrix); +} + +void CopyTextureCHROMIUMResourceManager::DoCopyTextureInternal( + const gles2::GLES2Decoder* decoder, + GLenum source_target, + GLuint source_id, + GLuint dest_id, + GLint xoffset, + GLint yoffset, + GLsizei dest_width, + GLsizei dest_height, + GLsizei source_width, + GLsizei source_height, + bool flip_y, + bool premultiply_alpha, + bool unpremultiply_alpha, + const GLfloat transform_matrix[16]) { DCHECK(source_target == GL_TEXTURE_2D || source_target == GL_TEXTURE_RECTANGLE_ARB || source_target == GL_TEXTURE_EXTERNAL_OES); + DCHECK(xoffset >= 0 && xoffset + source_width <= dest_width); + DCHECK(yoffset >= 0 && yoffset + source_height <= dest_height); if (!initialized_) { DLOG(ERROR) << "CopyTextureCHROMIUM: Uninitialized manager."; return; @@ -436,14 +543,27 @@ void CopyTextureCHROMIUMResourceManager::DoCopyTextureWithTransform( } #endif - glUniformMatrix4fv(info->matrix_handle, 1, GL_FALSE, transform_matrix); + if (!xoffset && !yoffset) { + glUniformMatrix4fv(info->matrix_handle, 1, GL_FALSE, transform_matrix); + } else { + // transform offsets from ([0, dest_width], [0, dest_height]) coord. + // to ([-1, 1], [-1, 1]) coord. + GLfloat xoffset_on_vertex = ((2.f * xoffset) / dest_width); + GLfloat yoffset_on_vertex = ((2.f * yoffset) / dest_height); + + // Pass view_matrix * offset_matrix to the program. + GLfloat view_transform[16]; + memcpy(view_transform, transform_matrix, 16 * sizeof(GLfloat)); + PreTranslate(view_transform, xoffset_on_vertex, yoffset_on_vertex, 0); + glUniformMatrix4fv(info->matrix_handle, 1, GL_FALSE, view_transform); + } if (source_target == GL_TEXTURE_RECTANGLE_ARB) - glUniform2f(info->half_size_handle, width / 2.0f, height / 2.0f); + glUniform2f(info->half_size_handle, source_width / 2.0f, + source_height / 2.0f); else glUniform2f(info->half_size_handle, 0.5f, 0.5f); - if (BindFramebufferTexture2D( - GL_TEXTURE_2D, dest_id, dest_level, framebuffer_)) { + if (BindFramebufferTexture2D(GL_TEXTURE_2D, dest_id, framebuffer_)) { decoder->ClearAllAttributes(); glEnableVertexAttribArray(kVertexPositionAttrib); @@ -466,7 +586,7 @@ void CopyTextureCHROMIUMResourceManager::DoCopyTextureWithTransform( glDepthMask(GL_FALSE); glDisable(GL_BLEND); - glViewport(0, 0, width, height); + glViewport(0, 0, dest_width, dest_height); glDrawArrays(GL_TRIANGLE_FAN, 0, 4); } |