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wined3d: Apply the half pixel correction for shaders too.

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Stefan Dösinger 2006-08-28 23:46:00 +02:00 committed by Alexandre Julliard
parent 20d98e81ed
commit bc449ca31f
1 changed files with 28 additions and 7 deletions
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35
dlls/wined3d/vertexshader.c
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@ -735,8 +735,18 @@ static VOID IWineD3DVertexShaderImpl_GenerateShader(
}
/* Write the final position.
* Account for any inverted textures (render to texture case) by reversing the y coordinate
* (this is handled in drawPrim() when it sets the MODELVIEW and PROJECTION matrices) */
*
* OpenGL coordinates specify the center of the pixel while d3d coords specify
* the corner. For that reason a translation is done with the projection matrix,
* which sets the offsets to move in the w coords of the matrix(see glTranslate manpage)
* Add the w coordinates to x and y, this avoids the need for a full matrix
* multiplication. The matrix is set up in drawprim.c, primitiveInitState.
*/
shader_addline(&buffer, "gl_Position.x = gl_Position.x + gl_ProjectionMatrix[3][0];\n");
shader_addline(&buffer, "gl_Position.y = gl_Position.y + gl_ProjectionMatrix[3][1];\n");
/* Account for any inverted textures (render to texture case) by reversing the y coordinate
* (this is handled in drawPrim() when it sets the MODELVIEW and PROJECTION matrices)
*/
shader_addline(&buffer, "gl_Position.y = gl_Position.y * gl_ProjectionMatrix[1][1];\n");
shader_addline(&buffer, "}\n\0");
@ -763,7 +773,8 @@ static VOID IWineD3DVertexShaderImpl_GenerateShader(
shader_generate_arb_declarations( (IWineD3DBaseShader*) This, reg_maps, &buffer, &GLINFO_LOCATION);
/* We need the projection matrix to correctly render upside-down objects (render to texture) */
shader_addline(&buffer, "PARAM PROJECTION = state.matrix.projection.row[1];\n");
shader_addline(&buffer, "PARAM PROJECTIONX = state.matrix.projection.row[0];\n");
shader_addline(&buffer, "PARAM PROJECTIONY = state.matrix.projection.row[1];\n");
if (reg_maps->fog) {
This->usesFog = 1;
@ -777,11 +788,21 @@ static VOID IWineD3DVertexShaderImpl_GenerateShader(
if (reg_maps->fog)
shader_addline(&buffer, "MAX result.fogcoord, TMP_FOG, 0.0;\n");
/* Write the final position.
* Account for any inverted textures (render to texture case) by reversing the y coordinate
* (this is handled in drawPrim() when it sets the MODELVIEW and PROJECTION matrices) */
shader_addline(&buffer, "MOV result.position, TMP_OUT;\n");
shader_addline(&buffer, "MUL result.position.y, TMP_OUT.y, PROJECTION.y;\n");
/* Write the final position.
*
* OpenGL coordinates specify the center of the pixel while d3d coords specify
* the corner. For that reason a translation is done with the projection matrix,
* which sets the offsets to move in the w coords of the matrix(see glTranslate manpage)
* Add the w coordinates to x and y, this avoids the need for a full matrix
* multiplication. The matrix is set up in drawprim.c, primitiveInitState.
*/
shader_addline(&buffer, "ADD result.position.x, TMP_OUT.x, PROJECTIONX.w;\n");
shader_addline(&buffer, "ADD result.position.y, TMP_OUT.y, PROJECTIONY.w;\n");
/* Account for any inverted textures (render to texture case) by reversing the y coordinate
* (this is handled in drawPrim() when it sets the MODELVIEW and PROJECTION matrices)
*/
shader_addline(&buffer, "MUL result.position.y, TMP_OUT.y, PROJECTIONY.y;\n");
shader_addline(&buffer, "END\n\0");