Display Size and loading Lenna

Code:

/*

 *

 *Draw a Rectangle this is a hard coded

 *draw witch is only good for the triangle

 *

*/

void Draw(Target_State *p_state)

{

    

    GLfloat RectVertices[] =

    { 

        -0.5f, 0.5f, 0.0f,//pos 0

         0.0f, 0.0f, //texCoord 0

        -0.5f, -0.5f, 0.0f,//pos 1

         0.0f, 1.0f, //texCoord 1

        0.5f, -0.5f, 0.0f, //pos 2

        1.0f, 1.0f,//texCoord 2

        0.5f, 0.5f, 0.0f,//pos 3

        1.0f, 0.0f//texCoord 3        

    };

    

    GLushort indices[] = { 0, 1, 2, 0, 2, 3 };

    

    // Setup the veiwport

    glViewport(0, 0, p_state->width, p_state->height);

    

    

    // Clear the color buffer

    glClear(GL_COLOR_BUFFER_BIT);

    

    

    // set up the program object

    glUseProgram(p_state->user_data->programObject);

    

    

    //Load the vertex pos

    glVertexAttribPointer(p_state->user_data->positionLoc, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), &RectVertices[3]);



    //Load the texture coords

    glVertexAttribPointer(p_state->user_data->texCoordLoc, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), &RectVertices[3]);

    

    glEnableVertexAttribArray(p_state->user_data->positionLoc);

    glEnableVertexAttribArray(p_state->user_data->texCoordLoc);

    

    

    //bind the texture

    glActiveTexture ( GL_TEXTURE0 );

    glBindTexture (GL_TEXTURE_2D, p_state->user_data->textureId);

    

    

    //Draw the rect as 2 sets of 3 vertices

    glDrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);

    

    if (glGetError() != GL_NO_ERROR) printf("Oh bugger\n");

    

}

Code:

GLushort indices[] = { 0, 1, 2, 0, 2, 3 };

Code:

int main(int argc, char *argv[])

{

    UserData user_data;

    bcm_host_init(); //RPI needs this

    esInitContext(p_state);

    uint width, height;

    //graphics_get_display_size(0, &width, &height);

    //init_ogl(p_state, width, height);

    init_ogl (p_state, 720, 720);

    p_state->user_data = &user_data;

    

    MyFiles FileHandler;

    

    if (!Init(p_state))

        return 0;

    esRegisterDrawFunc(p_state, Draw);

    //now do the graphic loop

    esMainLoop(p_state);

    



    int Width, Height;

    char* OurRawData = FileHandler.Load((char*)"../Assets/Lenna.png", &Width, &Height);

    if (OurRawData == NULL) printf("The thing didnt load\n");

    

    p_state->user_data->textureId = CreateTexture2D(Width, Height, OurRawData);

    

}

Code:

    state->width = width;

    state->height = height;

    

    dest_rect.x = 0;

    dest_rect.y = 0;

    dest_rect.width = state->width; // it needs to know our window size

    dest_rect.height = state->height;

    

    src_rect.x = 0;

    src_rect.y = 0;

// ADD these two lines to allow full screen to work    

    src_rect.width = width << 16;

    src_rect.height = height << 16;