coolkehon
Joined: 20 Oct 2008
Posts: 355
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 Posted: Sat Jul 11, 2009 1:00 pm Post subject: [Solved]Some Help with Texturing on the GU |
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i need some help with texturing on the gu
1) i dont understand uv mapping can someone explain and i already search on google and wiki and looked at psp-programming tuts + ghoti.nl
2) i was able to get an image to load and display once but the framerate was 16 fps so i'm think i was doing something wrong + i was just fiddling with stuff to get it to work and dont know how it got there
3) my texture wont show up and i know the image data is loaded correctly
here is how i init the gu
| Code: | //Initializes the GU, preparing it for use.
sceGuInit(); //Turn on the GU
sceGuStart(GU_DIRECT, display_list); //Start filling a command list.
// Set memory locations
sceGuDispBuffer(SCREEN_WIDTH, SCREEN_HEIGHT, (void*)0, PSP_LINE_SIZE); //Point out the display buffer
sceGuDrawBuffer(GU_PSM_8888, (void*)FRAMEBUFFER_SIZE, PSP_LINE_SIZE); //Point out the drawing buffer
sceGuDepthBuffer((void*) (FRAMEBUFFER_SIZE*2), PSP_LINE_SIZE); //Point out the depth buffer
// Configure viewport
sceGuOffset(2048 - (SCREEN_WIDTH / 2), 2048 - (SCREEN_HEIGHT / 2)); //Define current drawing area.
sceGuViewport(2048, 2048, SCREEN_WIDTH, SCREEN_HEIGHT); //Center screen in virtual space.
// Set up scissor test
sceGuScissor(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT); //Sets up a scissor rect for the screen.
sceGuEnable(GU_SCISSOR_TEST); //Enables scissor mode: pixels outside the scissor rect are not rendered.
// Set up alpha test
sceGuAlphaFunc(GU_GREATER, 0, 0xff); //if((alpha & 0xFF) > (0 & 0xFF)) {render pixel}
sceGuEnable(GU_ALPHA_TEST); //Enables sceGuAlphaFunc
// Set up depth test
sceGuDepthRange(0xc350, 0x2710); //Tells the GU what value range to use within the depth buffer.
sceGuDepthFunc(GU_GEQUAL); //Pixels with z less than or equal to the existing pixel z pass the test.
sceGuEnable(GU_DEPTH_TEST); //Only pixels that pass sceGuDepthFunc are rendered.
// Set up texture processing
sceGuEnable(GU_TEXTURE_2D); //Enables texturing of primitives.
sceGuTexMode(GU_PSM_8888, 0, 0, GU_FALSE); //32-bit colors, no mipmaps, (unk - set to 0), interpret images as swizzled
sceGuTexFunc(GU_TFX_REPLACE, GU_TCC_RGBA); //Configure the formulas used when blitting an image using sceGuTexImage
sceGuShadeModel(GU_SMOOTH); //Set shading model (required by dialogs)
// Set up alpha blending
sceGuBlendFunc(GU_ADD, GU_SRC_ALPHA, GU_ONE_MINUS_SRC_ALPHA, 0, 0); //Set up blending formulas.
sceGuEnable(GU_BLEND); //Activates blending according to sceGuBlendFunc
// Set up screen clearing parameters
// sceGuClearColor(0xFFFFFFFF); //Set the color used by sceGuClear when its passed GU_COLOR_BUFFER_BIT
sceGuClearColor(0); //clear the screen black =)
sceGuClearDepth(0); //Set the value to reset the depth buffer pixels to when using sceGuClear with the GU_DEPTH_BUFFER_BIT
// Miscellanaus Stuff
sceGuFrontFace(GU_CW);
sceGuEnable(GU_CULL_FACE);
sceGuEnable(GU_CLIP_PLANES);
sceGuDisable(GU_TEXTURE_2D);
sceGumOrtho(0,480,272,0,-1,1);
sceGuFinish(); //End of command list
sceGuSync(0, 0); //Wait for list to finish executing
sceGuDisplay(GU_TRUE); //vram should be displayed on screen.
// set so that we keep track of display of which display buffer is used
dispBufferNumber = 0;
return true; |
here is the main function graphics->init3dgraphics is what inits gu and tga loader is from psp-programming.com gu tuturials and it loads the texture i gave it in the one from psp-programming.com but wont load the same texture using the same class here and i think i'm blitting it wrong
the canvas stuff doesnt do anything just a holder incase i need to do something so ignore it
| Code: | pspDebugScreenInit();
sceRtcGetCurrentTick( &fpsTickLast );
tickResolution = sceRtcGetTickResolution();
CTGATexture texture;
if(!texture.LoadTGA("NeHe.tga"))
{
printf("unable to load image");
sceKernelDelayThread(3*1000*1000);
}
texture.Swizzled();
GraphicsInstance * graphics = GraphicsInstance::Instance();
graphics->Init3DGraphics();
display_list = graphics->getDisplayList();
DrawingCanvas canvas;
int count = 0;
while( 1 )
{
sceGuStart( GU_DIRECT, display_list );
sceGuClearColor(GU_RGBA(255,255,255,255));
sceGuClear(GU_COLOR_BUFFER_BIT|GU_DEPTH_BUFFER_BIT);
sceGuDisable( GU_DEPTH_TEST );
canvas.repaint();
sceGuEnable(GU_TEXTURE_2D);
sceGuTexMode( GU_PSM_8888, 0, 0, texture.Swizzled() );
sceGuTexFunc( GU_TFX_REPLACE, GU_TCC_RGB ); // Apply image as a decal (NEW)
sceGuTexFilter( GU_LINEAR, GU_LINEAR ); // Linear filtering (Good Quality) (NEW)
sceGuTexScale( 1.0f, 1.0f ); // No scaling
sceGuTexOffset( 0.0f, 0.0f );
typedef struct
{
float u, v;
float x, y, z;
} vertex2d; // vertex to render
vertex2d * points = (vertex2d *)sceGuGetMemory(4 * sizeof(vertex2d));
// setting the 4 vertices
points[0].u = 0.0f;
points[0].v = 0.0f;
points[0].x = 0;
points[0].y = 0;
points[0].z = 0.0f;
points[1].u = texture.Width();
points[1].v = 0.0f;
points[1].x = texture.Width();
points[1].y = 0;
points[1].z = 0.0f;
points[2].u = 0.0f;
points[2].v = texture.Height()-1;
points[2].x = 0;
points[2].y = texture.Height()-1;
points[2].z = 0.0f;
points[3].u = texture.Width()-1;
points[3].v = texture.Height()-1;
points[3].x = texture.Width();
points[3].y = texture.Height();
points[3].z = 0.0f;
// draw the trianglestrip with transform 2D
sceGuDrawArray(GU_TRIANGLE_STRIP, GU_TEXTURE_32BITF | GU_VERTEX_32BITF | GU_TRANSFORM_2D, 4, 0, points);
sceGuEnable( GU_DEPTH_TEST);
sceGuFinish();
sceGuSync(0,0);
FPS();
fbp0 = graphics->flipScreen();
}
delete GraphicsInstance::Instance(); // Terminating the Graphics System
return 0;
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Last edited by coolkehon on Sun Jul 12, 2009 3:35 pm; edited 1 time in total |
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